org.apache.xmlgraphics.image.loader.impl.imageio

Class ImageLoaderImageIO

java.lang.Object

org.apache.xmlgraphics.image.loader.impl.AbstractImageLoader

org.apache.xmlgraphics.image.loader.impl.imageio.ImageLoaderImageIO

All Implemented Interfaces:

ImageLoader

public class ImageLoaderImageIO
extends AbstractImageLoader

An ImageLoader implementation based on ImageIO for loading bitmap images.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	JPEG_METADATA_NODE
protected static org.apache.commons.logging.Log	log logger
private static java.lang.String	PNG_METADATA_NODE
private static java.util.Set	PROVIDERS_IGNORING_ICC
private ImageFlavor	targetFlavor

Fields inherited from interface org.apache.xmlgraphics.image.loader.spi.ImageLoader

MEDIUM_LOADING_PENALTY, NO_LOADING_PENALTY

Constructor Summary

Constructors

Constructor and Description
ImageLoaderImageIO(ImageFlavor targetFlavor) Main constructor.

Method Summary

Modifier and Type	Method and Description
private boolean	checkProviderIgnoresICC(javax.imageio.spi.IIOServiceProvider provider) Checks if the provider ignores the ICC color profile.
private java.awt.image.BufferedImage	getFallbackBufferedImage(javax.imageio.ImageReader reader, int pageIndex, javax.imageio.ImageReadParam param)
private javax.imageio.ImageReadParam	getParam(javax.imageio.ImageReader reader, java.util.Map hints)
ImageFlavor	getTargetFlavor() Returns the image flavor that is returned by this ImageLoader implementation.
Image	loadImage(ImageInfo info, java.util.Map hints, ImageSessionContext session) Loads and returns an image.
private java.awt.color.ICC_Profile	tryToExctractICCProfile(javax.imageio.metadata.IIOMetadata iiometa) Extract ICC Profile from ImageIO Metadata.
private java.awt.color.ICC_Profile	tryToExctractICCProfileFromJPEGMetadataNode(org.w3c.dom.Element jpgNode)
private java.awt.color.ICC_Profile	tryToExctractICCProfileFromPNGMetadataNode(org.w3c.dom.Element pngNode)

Methods inherited from class org.apache.xmlgraphics.image.loader.impl.AbstractImageLoader

getUsagePenalty, ignoreColorProfile, loadImage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static final org.apache.commons.logging.Log log

logger

targetFlavor

private ImageFlavor targetFlavor

PNG_METADATA_NODE

private static final java.lang.String PNG_METADATA_NODE

See Also:

Constant Field Values

JPEG_METADATA_NODE

private static final java.lang.String JPEG_METADATA_NODE

See Also:

Constant Field Values

PROVIDERS_IGNORING_ICC

private static final java.util.Set PROVIDERS_IGNORING_ICC

Constructor Detail

ImageLoaderImageIO

public ImageLoaderImageIO(ImageFlavor targetFlavor)

Main constructor.

Parameters:

targetFlavor - the target flavor

Method Detail

getTargetFlavor

public ImageFlavor getTargetFlavor()

Returns the image flavor that is returned by this ImageLoader implementation.

Returns:

the target image flavor

loadImage

public Image loadImage(ImageInfo info,
                       java.util.Map hints,
                       ImageSessionContext session)
                throws ImageException,
                       java.io.IOException

Loads and returns an image.

Parameters:

info - the image info object indicating the image

hints - a Map of hints that can be used by implementations to customize the loading process (may be null).

session - the session context

Returns:

the fully loaded image

Throws:

ImageException - if an error occurs while loading the image

java.io.IOException - if an I/O error occurs while loading the image

getParam

private javax.imageio.ImageReadParam getParam(javax.imageio.ImageReader reader,
                                              java.util.Map hints)
                                       throws java.io.IOException

Throws:

java.io.IOException

checkProviderIgnoresICC

private boolean checkProviderIgnoresICC(javax.imageio.spi.IIOServiceProvider provider)

Checks if the provider ignores the ICC color profile. This method will assume providers work correctly, and return false if the provider is unknown. This ensures backward-compatibility.

Parameters:

provider - the ImageIO Provider

Returns:

true if we know the provider to be broken and ignore ICC profiles.

tryToExctractICCProfile

private java.awt.color.ICC_Profile tryToExctractICCProfile(javax.imageio.metadata.IIOMetadata iiometa)

Extract ICC Profile from ImageIO Metadata. This method currently only supports PNG and JPEG metadata.

Parameters:

iiometa - The ImageIO Metadata

Returns:

an ICC Profile or null.

tryToExctractICCProfileFromPNGMetadataNode

private java.awt.color.ICC_Profile tryToExctractICCProfileFromPNGMetadataNode(org.w3c.dom.Element pngNode)

tryToExctractICCProfileFromJPEGMetadataNode

private java.awt.color.ICC_Profile tryToExctractICCProfileFromJPEGMetadataNode(org.w3c.dom.Element jpgNode)

getFallbackBufferedImage

private java.awt.image.BufferedImage getFallbackBufferedImage(javax.imageio.ImageReader reader,
                                                              int pageIndex,
                                                              javax.imageio.ImageReadParam param)
                                                       throws java.io.IOException

Throws:

java.io.IOException